Thousands of residents were forced to evacuate as firefighters worked to contain the blazes. As of Friday morning, more than 20 million people were under red flag warnings across the state.

On Friday afternoon, Kardashian West tweeted that flames had hit the property she shares with her husband, Kanye West.

Kardashian West's sisters, Kourtney Kardashian and Khloe Kardashian, also had to leave their homes.

"I can not sleep! I am too nervous with these fires #MamaKoKo," Khloe Kardashian posted on Twitter.

Alyssa Milano wrote on Twitter that she evacuated as well, and after initially believing her horses to be in safe hands, later expressed concern for their safety.

"If anyone can get 5 horses out the fire please help me," she wrote.

"Shape of Water" director Guillermo del Toro said he evacuated Thursday night. His non-primary residence, a well-known museum of creepy art and memorabilia called Bleak House, was also in the fire's path, he said.

"Bleak House and the collection may be endangered but the gift of life remains," he wrote on Twitter.